Wood-heel-turning machine



Jan. l5, 1929. n 1,699,077

R. H. PETrENGlLL WOOD HEEL TURNING MACHINE I/ i v /x C) fgvew'ag Patented Jan. 15, 1929.

UNITED STATES PATENT OFFICE.

WOOD-HEEL-TURNING MACHINE.

Application filed May 5, 192s. serial No. 275,344.

This invention relates to that type of Wood heel turning machines, or machines which form the back and sides ofV Wood heels, on Which the heel blank is mounted on a holder` and is moved into operative relation successively, with a pair of oppositely rotating cutters, the blank being shaped on one side from the breast to the middle of the back, by one cutter and then being shaped in like manner on the opposite side by the other cutter.

In performing this operation the shape ot' the side surfaces formed on the blank are determined by the shape of the cutter knives, and by the movement of the-holder relative thereto, as the operation is being performed,

the holder having' a combined horizontal swinging and vertical tilting movement, and in some instances a bodily vertical movement, and the present invention particularly relates to the means for controlling the vertical swinging movements of the holder.

The construction which is used in this connection almost universally comprises a U- torni track on Which the holder is supported at its outer end, the means for support-ing the track being vertically adjustable and the track being held at dili'erent inclinations relative thereto. To vary the inclination of the track and thereby vary the inclination or pitch of the back oi' the heel, the track has been pivotally mounted at its ends on the vertically adjustable suppoitI on Which it is mounted (as disclosed in Patent No. 1,247,- 335), the pivots on which the track is mounted being located beneath the track in proximity to the vertical plane of the axes of the cutters. lilith this arrangement the eX- teut to which any portion ot the track is moved vertically when it is adjusted increases irom a minimum at its ends to a maximum at the middle tl'iereof. In consequence the inclination of the back of the heel which is formed decreases from a maximum at this point to a minimum at the breast edge. With this arrangement, any variation of the inclination of the track varies its elevation to some extent at all points therein Which support the jack. In making the necessary adjustments with this arrangement, to secure a desired pitch at the back of a. heel, the bracket, or support on which the track is mounted, is first adjusted vertically, so that, when the holder is swung to either side, the desired formation of the front portion ofthe sides of the heel, or portions adjacent the breast will be secured. Ifthen the inclination of the track is varied to secure the desired pitch at the back, the result will be that the adjustment for the front portion of the sides Will be disturbed to such an extent that further vertical adjustment of the support Will be necessary to compensate for the second adjustmeut. In consequence a series of adjustments, firstof the elevation of the track and then of its inclination must usually be made before approximately the formation desired at all points is secured.

The object of my invention is to provide a torm of adj ust-ment in the connection above referred to, whereby a single adjustment may be made with relation to a cutter of predetermined conliguration to secure the desired formation at the side of-the heel adjacent the breast, and then a further adjustment may be made to secure the desired pitch at the middle of the back Without disturbingQor in any Way affecting the adjustment which has previously been made.

I accomplish this object primarily by so mounting the track which controls the inclination of the blank holder With relation to l the vertical, that adjustment thereof to vary the pitch of the heel at the back Will be about an axis which intersects the points or contact of `the jack with the track when in thc opposite side positions to Which it is moved to form the side surfaces adjacent the breast.

For a more complete disclosure of my invention,` and the particular means Which I preferably employ in this connection, reference is now made to the following specification in connection With the accompanying drawings, in which j Fig. 1 is a front elevation of a Wood heel turning machine containing an embodiment of my invention. A

Fig. 2 is a plan View and j Fig. 3 is a side elevation thereof'.`

Fig. 4 is a detail side view of the upper track.

Fig. 5 is a sectional View, scale, atline 5--5 of Fig. 4. j

Fig. 6 is a detail perspective view of one of the pivotal supports for thetracks.

Fig. 7 is a plan view of one member of the support and j u Fig. 8 is a sectional view of the other mem-` ber thereof. .l

on an enlarged In the drawings a common type of wood heel turning machine is illustrated, comprising` a trame 1D, in which a pair et cutter shafts 11 are mounted to rotate about vertical axes, said shafts havingcutter knives 12 of suitable formation mounted thereon at their upper ends. A vertical pivot shaft 13 is mounted midway ot the cutter shafts and a bracket 14 is supported thereby to swing horizontally. A vertical shaft 15 is rotatably and slidably mounted in the end ot said bracket and the jack or heel holder 16 is pivotally mounted to swing vertically on the upper end et said shaft 15. A horizontally disposed, Ueshaped lower track 17 is supported on a vertically adjustable bracket 18 mounted on the traine and an arm 19 on shaft 15 rests thereon to support said shaft 15 in all posit-ions of the jack. il vertically adjustable bracket 20 .is also mounted on the 'traine 10 and a U-shaped upper track Q2 is suported on said bracket in a manner to be speeilically described.

rlhe jack 1G is pi i\i led with a shoe 2li on its under side, said shoe extending;- longitudinally o'if the jack in position to rest crosswise el the track to suma-ort the ack thereon. The lower edge ot the shoe and the upper edge ot the track are rounded transversely as yshown in Figs. 4; and 5. so that the oppositely rounded surfaces provide practically a single point oit contact. The jack is provided with the usual guide cani which is ar ranged to engg'agc a lined guard 2G adjacent each cutter head. said cani corresponding` in shape to the outline oi' the base surface ot the heel'blank to be turned, so that, when the jack swing to either' the lfull or dotted line position ot Fig. 2, in which one side portion, or the other oii the cam engaged with one ot' the guards QG, one ot the cutters will be engaging the blank on the jack at one side near the breast surface, or approximately midway beta-'een the breast and the middle. ol the side, at which peint the Yformation desired under practically all coiulitions may be secured without varying; the inclination et the track Whel the je. 2k is in this )osition the shoe Edil rests on the track at a certain point, which is indicated by point X in 4l, the point X on each end portion oi the track bein g located in the straipjht line a'f-ai ot Figi'. 2.

The operation ot tbe machine. as thus l'ar described, is the saine with all other nra chinos ot this type, the cutters being rotated oppositcly, as indicated by the arrows in l? 2; and the holder being successively swung trom the initial p sitions at the right and at the lett et the cutters indicated by lines y and y in Fig'Q to the middle posit-ions indicated by lines .e-s in Fig. 2, to shape each side et the blank from the breast to the middle of the back.

According to my invention, in mount-ing the track 2Q on the bracket 20. I provide a pair oi rocker bedsr Q8 which are mounted on bracket 2G directly beneath the opposite end portions et track Q2, said beds each having` a recess 29 in its upper side the bottom et which is concave and curved on a radius, when the parts are in position7 having its center at 'the point A rocker 30 is secured on the under side oi each end portion ot track 22, and has a convex under face which Vlits the bottoni oit recess 29, so that a pivotal support is provided tor each end portion oi? track 22, which has its axis coincident with the line v -a connecting the points X on the top ol' the opposite end portions ot the track. Each rocker bed Q8 has a vertically projecting;` portion 31 at the outer side there et. the inner side ol each projecting; portion being' under-cut to torni a groove 321, the bote toni el which is continuoir with the bottoni ol" recess 539 and the top side ot which is termed oncentrically therewith and the rockers l0 are cach iLirovided with a ilanufe Elli at the outer sides thereof, the bottoni ot' each tianne heini; continuous with the under side oi" the rocker and the top side thereof being 'termed concentricall),r therewith and adapted to be tilted into the groove 3&2 correspendingl the-reto, as shown in (i. lilith this arrangement the track Q2 is pivotally mounted on the bracket 2O to tilt about the axial line mfc" thru the points X, and is securely held against lateral or vertical movenient.

Lshiitable means ttor supporting and vertically adjusting the track 9,2 about the axial line :i2-00' are provided, the (misti-action shown comprising a rod 35, which is pivot; llr connected 'to said middle portion olix the track and a clamp B6 which is pirotall'j,Y connected to the bracket 2O and in which rod 35 slidable, the construction pei-'niittiiinT the rod to be secured in any position therein. so that. to adjust the .inclination oli the track 22, the rod 35 is moved longitudinally in the clamp 5G, causing the track to be tilted about the axial line thru points )i and when the desired inclination secured. the rod will be locked by the cianip securely holdingI the track in the position to which it is adir ted.

ldfiih the above described consisuction. in adliustina' the apparatus to produce a heel blank harina' a certain i'orination at its sides and bach. al the cutter knives. ha''inc quitably shaped cultic edges? have been to the cutter h.V the bracket 20 will be vcrticallj,` adjusteil to a position in which the die sited formation oil" the Airont portion. ot the sides oi the blank is sccureiil. when the liach is held in the iii-ill or dotted liin` position et 9i. in which position the shoe dat olf thijack will be resting on the 4ack at the point X. or in close proximity thereton to which position, in making' the eut at either side, the ack will have been advanced troni loo lill

the cxtreme position, indicated b v dotted linea y, y in Fig. Q. The inclination of the track is then adjusted to secure the desired pitch at the middle of the back of the heel` and this adjustment in no Way disturbs the adjustment previousl made for the forniation when the jack is in the side position over the point X. The correct adjustment to secure 'the production of a heel blank of certain formation may thus be quickly secured by makina' tivo adjustments, readjustnicnt at one pointto compensate for adjustment at another point thus being; unnecessary.

I claim:

l. In a Wood heel turnino' machine a cut-` ter niounted to rotate about a vertical axis, lic-el blank holder mounted to swing horizontalljv and tilt ortically. to hold the blank i n operative relation with the cutter'and succ. ,'velv form the opposite sides thereof, and a track extending' oj'ipositeljv from a point in front of the cutter to points at opposite sides thereof in position to support said holder and to tilt it vertically as it is moved horizontally, said track beinp; pivotall)T mounted at points adjacent the opposite sides of the cutter to tilt about an aXis gading approximately thru the points of engagement of the holder with the track when in positions to forni the side portions of the heel acent the breast thereof.

In a Wood heel turninpI machine, a cutter mounted torotate about a vertical axis, a heel blank holder mounted to be swung horizontallv about the cutter and to be tilted vertically to and from the saine, to hold the blank in positions successively toform the opposite sides of the heel, and a U-form track having1 its ends disposed at the same elevation at opposite sides of the cutter and its interniiediate portion disposed in front thereof to provide a rest for supporting theholder and controllingl its tilting movements, said track being; supported for adjustment about a horizontal axis arranged to permit adjustment thereof Without varying the position of the holder when the latter is held in a pos on to permit operation of the cutter on the blank at either side thereof' adjacent its breast face and to vary the position to which it is tilted at other points.

Il. in a wood heel turningl machine, a pair o' cutters mounted to rotate about vertical heel blank liolde mounted at its inner ad between said cutters to be sn'unfr horizontally and tilted vertically in operative relation with said cutters, successivelvto form the opposite sidesl of the heel from br a to back as the holder is moved from initial positions at the right and the left of the critters to a position in front thereof, a horizontally disposed track arranged to support said holder at its outer end, to control its tilting movements and to extend from a point in front of the cutter to the right and to the left thereof, and a vertically adustable support for said track having a pivotal connection therewith arranged to permit variation ofthe inclination ofthe track about an axial line, so located that adjustment thereof does not 'ltantially affect the position of the holder when the latter held in a position adjacent each initial position thereof. i

4. In a wood heel turning machine, a pair of cutters mounted to rotate about vertical artes, a heel blank holder mounted at its inner end between said cutter to be swung horizontally and tilted vertically in operative relation with said cutters succc-ssiveljr to form the opposite sides of the heel from breast to back, as the holder is moved from initial positions at the right and the left of the cutters to a position in front thereof, a horizontally disposed track arranged to support said holder at its outer ond, to control its tilting movements and to extend from a point in front of the cutter to the rigi'htjand to the left thereof and a vertialljY adjustable j support for said track, having' a pivotal connection therewith arranged to permit variation of the .inclination of the track about an axial line, which intersects correspondingg'ly opposite points in the track which support the holder during an initial portion of each operative movement thereof.

5. In a Wood heel turning machine comprisingr a cutter mounted to rotate about a vertical axis, a heel blank holder mounted to swing horizontally and vertically relatively to the cutter, a horizontalljT disposed U-shaped track having its end portions at opposite sides of the cutter and its middle portion extending in front thereof, for controlling the vertical swinging movements of the holder, an arm extending downwardly from each end portion ot' the track, each having a convex-bearinnr face at its lower end formed about an axial line which intersects correspondingly opposite points in the end portions of the track surface, a support having bearing recesses correspondingly shaped and arranged to receive said convex faces, to permit vertical adjustment of the track about said line as a center and means for holding the track in its different positions of adjustment about said" aboli@ Suid axial line, and moans for hnldng the mck in its dfment posstlon of adjustnxu about said axial line In emony whereof, I have signed my mme sto 'this Specication.

BALP' HOWILRD P'ETTENGILL 

